玉米是一种雌雄同株的植物正常植株的基因型为a B 其顶部开雄花下部开雌花基因型为aab 的植株不能开出雌花而成为雄株基因型为a Bb Template




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tomski玉米是一种雌雄同株的植物正常植株的基因型为a b 其顶部开雄花下部开雌花基因型为aab coloring